Extension device



March 4, 1930. J.- N. KUEHNE nxmsxou nmnca Filed Aug. 5, 192'! 2Sheets-Sheet 1 IN! 'EN TOR.

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' MM Mar. 4, 1930 UNITED. STATES :rosnrz u. wanna, or uneven, xzmrucxy,assrenoa r THE wanswomn wa'ron' oasn coxrm, or narrow, xamucxr, acoaromrzon or maroon immersion nnvxon Application filed August 5, 1987.Serial 10'. 810,860.

This invention relates to certainnew and v useful improvements in wristwatch. straps and more particularly to improved means for enabling theband to be lengthened so as to permit it to be removed from the wearerswrist over the hand without disconnecting the ends of said straps. v

A further ob'ect of the invention is to provide means or enablin theband to be easily and quickl adjuste as m length so as to fit wrists 0different sizes and to also enable the wearer to make such ad'ustmentwithout removing the band from t e wrist. A still further object of theinvention is to provide novel meansfor lockingthe lengthemng means whenin closed pos1t1on about the wearers wrist.

With the above and other objects in view the invention consists in theconstruction combination, location and arrangement of parts as hereinset forth and claimed.

In the drawings: I v Fig. 1 is a side elevation of the inventlon shownin closed osition and attached to a 5 watch case, the atterbeinglllustrated by dotted lines;

Fi 2 is a view similar to Fig. 1 but showing t e invention in open orenlarged POSI- tion;

Fig. 3 is abottom view of Fig. 1;

Fi 4 is a partial .view of one of the band mem ers;

Fi 5 is a partial view of the otherband mem er; 1

Fig. 6' is a planjview of the lock slide;

Fig. 7 is an edge view thereof;

Fig. 8 is a vertical cross-section taken on a plane corresponding toline 88 of Fig. 1;

ig. 9 is a diagrammatic isometric view of SCll tion proceeds.

the invention shown in open position;

Fig. 10 isa vertical cross-section taken on a plane corresponding toline 1010 of Fig. 9;.

Fig. 11 is a view similar to Fig. 1, the watch case being omitted andthe lengthening device shown partially opened; 7

Fig. 12 is a ,plan view of the invention shown in open position, theparts being broken away to more clearly ilustrate the invention;

Fig. 13 is a longitudinal section taken on a plane corresponding to line1313 of tion of the folding section showing the lock in open position;and

Flg. 15 is a similar view showing the lock in closed position.

In the embodiment of my invention as,

illustrated and which shows a preferred construction I provide metalbands 1 and 2,

preferably fiat, the outer ends of which bands terminate in tubularportions 3 and 4, respectively, which extend between the usual lugs 5dls osed' at the ends of usual watch case 6 an receive the usual pins orbars 7 thereby suitably attaching the outer ends of said bands 1 and 2,res ectively, to the watch case 6 in the usual an .The inner ends ofbands 1 and 2 are spacedly connected by a connector composed ofrectangular slotted curved housing 8 and open .frame or skeleton curvedlink 9 hinged towell-known manner.-

gether by pivot pin 10. The inner end of band 2 terminates in ,tubularportion 2 which extends between the curved arms 11 of open frame orskeleton link 9 and is pivotally connected to said link as by pin 12passing therethrough and secured to saidvarms. The inner end of band 1is provided with longitudinal spaced apart cuts'or slots 1, as clearlyshown in Fig. 5, thus terminating the end in three parts, 1*, 2", and3", respectively. The end portion of art 3", is bent at right angles tothe faces of and 1, thereby forming holding lip 3. The parts 1 and 2",respectively,

are bent slightlyaway from art 3", thereby forming spring members, t epurpose of which will be more fully described as the de ousing 8comprises sides 8", top 8 and bottom portions 8", the latter bein spacedapart from said and from 6.151 other. The bottom portions 8 of housing 8are provided with a series of spaced apart opposites ly disposed slots8, so as to enable the inner end of band 1 to be adjustably connectedwithin housing 8, as by lip 3 thereon engaging any set of said slots 8",at various points along the length of said housing. The top 8" ofhousing 8 extends beyond the bottom ortions 8 and is bent inwardly toform tuular portion 8, which tubular portion receives the pin 10 asbefore described. Two

pairs of o positely dis osed slots 13 and 14 respective y, are cut inottom portions 8, of

housing 8 (near tubular portion 8f, as shown in Fig. 9) and are adaptedto receive lockin lip 15 integral with one end of combine keeper andlock 16. The opposite end of lock 16 is provided with integral curvedhook 17 which terminates in fin er-catch 18. 'The central portion oflock 16 is slotted, thereb forming elon ated openin 19, within whicopening holding lip 3 of and 1 is inserted, as clearl shown in Figs. 12and 13, respectively. he curved arms 11 are substantially L-sha ed incross section to form inwardly extending ledges 8, (see Fig. 9); thusthe housing 8 will snugly fit between the wider portions of said armsand the band 2 will snugly fit between said ledges 8 or the narrowerportions of said arms, therebyeliminating any gap or space between saidband 2 and curved arms 11 when the band is closed, as shown in Fig. 3.

The operation of my invention is as follows:

Assume that the band is about the wearers wrist in closed position, asshown in Fig. 1, with the keeper and lock 16 in closed position. Toexpand or lengthen the band so that the same can be removed from thewrist without disconnecting the bands 1 and 2 from eachv other or fromthe watch, simply grasp finger catch 18 and draw outwardly thereon tothe position shown by dotted lines in Fig. 1, thereby disengaginglocking lip 15 from within the pair of slots 14 and engaging said lipwithin the pair of slots 13. The housing 8 and link 9 may then be swungapart about pivot pin 10, as clearly shown in Figs. 2 and 11, thusexpanding or lengthening the band opening A, as shown in Fig. 1, to anenlarged o ening B, as shown in Fig. 2, thereby enabhng the band to beeasily removed from the wrist over the hand.

Should it be desired to reduce the size of opening A when the band is inclosed position, it is merely necessary to swing the housing 8 and link9 apart, as above described, then with the thumb nail disengage holdinglip 3 from its present pair of slots 8 by pressing downwardly thereonand sliding and 1 forward within housing 8 thereby bringing said'holdinglip 3 nearer the end of housing 8 toward carrying pin 10,'which shortensthe band 1 between said housing 8 and tubular portion 3. The springmembers 1 and2 firmly hold lip 3 of band 1 within any selected pair ofslots 8. When the housing 8 and link 9, respectively, are in thepositlon shown in Fig. 11 and the lock 16 is positioned so that lip 15is engaged within slots 13, by nesting said housing 8 within on fingercatch 18 until locking lip 15 is disengaged from within slots 13 andsnaps into, slots 14 at which time curved hook 17 snu 1y engages theouter periphery of said tubular portion 2 of band 2' (see Fig. 15), thussecurely locking said housing 8 within said link An advantage of thisinvention is that the link 9 being of skeleton construction, and nestingslotted housing 8 and band 2 therein when the parts are in foldedrelation, reduces to a minimum the thickness of said members when inclosed position and thus forms a very compact construction.

A further advantage of m invention is the ease with which the ban 1 canbe ad- 'usted to various desired points along the ength of slottedhousing 8.

While I have shown a preferred construction, it is to be understood thatcertain chan es and modifications of the invention can e made withoutdeparting from the scope or spirit thereof as defined in the claims.

What I claim as new and desire to secure by Letters Patent is:

1. In means of the character described, a pair of bands, a foldingsection disposed between the inner end of each of said bands comprisinga link and a housing, said housing having inturned spaced apart flangesprovided with a series of pairs of spaced apart slots and hingedly"connected to said link at their inner ends, the inner end of one ofsaid'bands bein hingedly attached to the outer end of said link, theinner end of the other band having an upturned lip adapted forengagement within a selected pair of said spaced apart slots in saidhousing for longitudinal adjustment of said last mentioned band relativeto said housing, and locking means for holding said housing in nestedrelation with said link.

- 2. The pair of bands, housing and link as specified in claim 1,wherein the locking means comprises an elongated slotted keeper and lockhavin a hook and finger-catch on one end and adapted to fit over one ofsaid bands within said housing, and having a lip on its other endadapted to engage a pair of slots in said housing.

3. In means of the character described. a pair of bands, foldingsections disposed between the inner ends of said bands com rising arectan lar shaped housing an an open frame pivotally attached to eachother at their inner ends, a plurality of spaced apartoppositely-disposed slots in said housing, the mner end 0 one of saidbands having an upturned lip and spring members thereon to automaticallyengage said lip in said slots and adapted to be telescopically receivedb said. housing, the inner end of the other and being hin edly attachedto the outer end of said open ame, and a combined'keep'er and lockinserted within said housing and adapted to securely lock said housingwithin said open frame when dehousing may be detachably held in suchcomsired. l

4. In means. of the character described, folding sections disposedbetween the spaced apart inner ends of bands and comprising a housingand an open frame hingedly connected to each other at their inner endssaid housing being provided with a series of spaced apart oppositelydisposed slots, means for hingedly connecting the inner end of one ofsaid bands to the outer end of said open frame, means for adjustablyconnecting an end of the other band within said housing, comprising anupturned lip integral with said last mentioned band, and adapted forinsertion within a selected pair of said slots in said housing, andmeans for locking said housing in nested relation with said open frame.

5. In means ,of. the character described, a pair of bands, foldingsections disposed between the inner ends of said bands and comprisingahousing and a frame hinged together, one of said bands beingtelescopically i received within and adjustably secured to in nestedrelation with said said housing and the,other of said hands beinghingedly connected'to said frame and longitudinally slidable means inand relaframe. 6. In means of the character described, a

- link having an inwardly extended ledge on each inner side adjacent oneedge thereof, a

housing pivoted to said link and adapted to telescopically receive andhold in adjusted -position one endof a metal band and said link beingpivotally connected withone-end of another'metal band whereby saidhousing ma be folded into nested relation with said 1i and'the pivotedend portion ofsaid band may be also nested within said link between saidledges whereby a very compact folded construction is secured, andlongitudinally slidablemeans in and relative to said housing for lockingsaid members in folded relation. 7. In means of the character described,a

housing adapted to telescopically receive and hold in adjusted position,one end of a metal band, a link pivotally connected to saidhousing andto one end of another metal band w e band, a link pivotally connected tosaid housing and to one end of another metal band whereby said link may'be folded into comact relation withsaid housing, and a slotted eeperhaving a hook'on its outer end adapted to slidably engage said link anda holding lip on its inner end adaptedto' adjustably engage said housingwhereby said link and pact relation.

housing having one longitudinally slotted walland having oppositelydisposed slots in the edges of said slotted wall, a metal band folded'over said housing and held thereover' by said-keeper, for the urposesspecified. V 1Q. In means of the c aracter described,"a

In means of the character described, a

housing adapted to telescopically receive one end of. a band having anintegrally formed lip and spring members, an open frame or link hingedto said housing and to one end of another band, locking means forholding said housing in nested relation with said *open frame,comprising an elongated body portion, one end of which is provided witha lip adapted to engage a pair of spaced apart slots in said housing andthe other end of said locking member terminating in an outwardly curvedhook and finger catch, a second pair of slots in said housing adapted toengage said lip' of said locking member when said member. is in lockedposition and a plurality of spaced apart slots in said housing wherebysaid telesco ing band may be adjustably held in said ousing.

.11 In means of the character described, a

housing and aframe hinged together, a band havin one end thereofpivotally attached, to said ame and another band telescopically receivedwithin and adjustably secured to said housing, and longitudinal slidablemeans in and relative to said housing for Y locking said housing innested relation with said frame.

reb said link may be folded into com pactre ation with said housing1 andlongitudinally slidable means in an relative to said housing for lockingsaid link and housing in such compact relation.

8. In means of the character housing adapted to telescopically receiveand hold in adjusted position one end ofa metal described, a:

iso

